Mixing-machine.



K. STERNBERG.

MIXING MACHINE.

APPLICATION TILED 0011.14. 1910.

1,009,802. Patented Nov. 28, 1911.

s SHEETS-SHEET 1.

A [M @313 M aflo'zucum M K. R. STERNBBRG.

MIXING MACHINE.

APPLICATION FILED OGT.14. 1910.

1 1.11 BOQ Patented Nov. 28, 1911.

3 SHEETSSHEET 2.

K. R. STBRNBERG.

MIXING MACHINE.

APPLICATION FILED OCT. 14, 1910.

Patented Nov. 28, 1911.

3 SHEETSSHEET 3.

(June 11 lc:

UNITED sTATEs aren't. OFFICE.

KURT It. STERNBERG, F SPRINGFIELD, MASSACHUSETTS.

MIXING-MACHINE.

To all whom it may concern:

Be it known that l, KURT R. STERNBERG, a citizen of the United States of America, residing in the city of Springfield, in the county of Hampden, State of Massachusetts, have invented certain new and useful lmprovements in Mixing-Machines, of which the following is a specification.

This invention relates to improvements in mixing machines for plastic, dry, fluid and pulverized material, such as insulating material, composition-goods, pastes, paints, liquids, etc., the mixing machine being so constructed that a uniform and thorough intermingling of the substances forming the mass is produced in a quick and effective manner, and that the so-called dead spaces in the tank where some portions of the mass are held at a standstill, are obviated, and these portions returned within reach of the stirring mechanism, for the effective working up and mixin of the same; and for this purpose the invention consists of a mixing machine, which comprises a tank having interior slantingribs or corrugations, upright shafts supported in said tank, said shafts being provided with radial stirrer-arms that intermesh with the stirrer-arms of the adjacent shafts, and means for imparting rotary motion to said stirrer-shafts.

The invention consists further in the combination, with the tank and stirrer-shafts, of yokes provided with step and neck-bearings for said stirrer-shafts, and mechanism for imparting to said yokes and stirrershafts an oscillating motion for moving the portions of the mass located in the dead spaces of the tank reached by the stirrerarms within the reach of the same, for effectively working up the substances composing the mass.

The invention consists further of certain details of construction and combination of parts which will be fully described hereinafter and finally pointed out in the claims. I

In the accompanying drawings, Figure 1 represents a side-elevation of my improved machine for mixing materials; Fig. 2 is a plan-view of Fig. 1; Fig. 3 is a vertical central section on line 33,Fig. 2; Fig. 4 is a horizontal section on line li- 1, Fig. 3; Fig. 5 is a detail section, showing the inter-meshing stirrer-arms, on line 5-5, Fig. 4; Fi 6 is a side elevation of a modified constructlon Specification of Letters Patent.

Application filed October 14, 19110.

and interminglingv Patented Nov. 28, 1911. Serial No. 586,963.

of the mixing machine; and Fig. 7 is a horizontal section on line 77 of Fig. 6, showing the mechanism for imparting oscillating motion to the yokes and stirrer-shafts.

Similar letters of reference indicate cor responding parts in the different figures of the drawings.

Referring to the drawings, 25 represents a cylindrical tank, which is made of boiler iron or other suitable material. The tank is provided with an inclined bottom 23', for permitting the flow of the plastic or other material mixed in the tank toward a discharge-faucet t that is inserted into the tank near the lowermost end-portion of the bottom 25' as shown in Fig. 3. The tank t is provided at diametrically-opposite points with gudgeons 9 about midway ofits height, which are supported in V-shaped yokes b that are attached to the floor, said yokes being provided with slotted vertical portions at their upper ends for lifting the tank above the floor and permitting the tilting of the same. For this purpose the vertical portions of the supporting yokes are provided with pivoted stays g, which areplaced under the gudgeons 9 when the tank is raised, so as to support the same for tilting cross-frame a, which is provided at its ends with downwardly-bent recessed flanges c that are firmly clamped to the upper end of the tank by screws c.- Between the cross frames 0 and a yoke d at the upper end of a center-shaft s, are arranged gear-wheels, by which rotary motion is imparted to four upright shafts s, which are suspended from the upper yoke a? and-supported in stepbearings of the lower yoke d turning freely around the center-shaft s. p The upright shafts s 'are provided with diametricallyextending stirrer-arms a, which are bent or shouldered between their inner and outer ends in such a manner that the bent or shouldered portions of one stirrer-shaft are arranged farther Fvnm f'ka lewe f th I shaft and gradually nearer to the upper ends of the shaft where the shoulders are closer to the shafts, as shown in Fig. 3, while the stirrer-arms of the second shaft are arran ed in a reversed manner with the bent or s houldered portions fa ther from the upper end of the shaft and gradually approaching closer to the lower end of the shafts. The stirrer-arms of the third shaft are arranged like those of the first shaft and the stirrer-arms of the fourth shaft like those of the second shaft, so that the material to be mixed is drawn by the stirrer-arms of the first and third shafts toward the upper end of the tank and by the arms of the second and fourth shafts toward the lower part of the tank. The stirrer-arms a are made of such a length that the ends of the arms of one shaft pass between the ends of the arms of the adjacent shafts, so that the plastic'or other material to be. mixed is cut up effectively by the stirrer-arms and thoroughly mixed in its course from the upper to the lower part and back again from the lower to the upper part of the tank. The inner surface of the tank is provided with downwardly-slanting ribs or corrugations e laterally inclined on the inner surface of the tank for guiding the material to bemixed in upward and downward direction respectively, and conducting it into the paths of the intermeshing stirrer-arms. Rotary motion is imparted to the stirrer-shafts from an overhead driving-shaft s, which is supported in journal-bearings of upright standards 5 attached to the upper stationary cross-frame or yoke, as shown in Fig. 2, said driving-shaft being provided with a loose and a fast pulley p, p, for the drivingbelt. A bevel gear-wheel on the drivingshaft transmits motion to a bevel gearwheel 0 on the upper end of the centershaft 8 while intermeshing gear-wheels c of equal size, which are mounted on the upper ends of the stirrer-shafts, are driven by.

a pinion c on the center-shaft s and impart rotary motion to the stirrer-shafts, as shown by thearrows in Fig. 2. By the r0- tary motion of the stirrer-shafts-and the cutting of the stirrer-arms through the plastic or other material to be mixed, the material is kept in continuous mot-ion, which is assisted by the slanting ribs or corrugations on the interior of the tank, so that a thorough intermingling ofthe material to be mixed is obtained until the mass arrives at the required homogeneous condition required. It can then be readily drawn off through the faucet arranged near the lowermost point of the inclined bottom of the tank, or removed from the tank by lifting the entire system of stirrer-shafts and.

arms. with the driving mechanism bodily out of the tank by a suitable hoisting tackle applied to an overhead support and the driving-shaft, after the clamping-screws, by

which the cross-frame is attached to the rim of the tank, are loosened. In this raised position, the stirrer-arms can be conveniently cleaned of the material adhering thereto, while the tank is tilted for removing 1 its contents and then cleaned preparatory the floor.

.claim as new and "to receiving a new charge of the same or Figs. 6 and? isused. In this case, the

stirrer-shafts are supported on the crossframes or yokes d, d one near the bottom and the other near the top of the tank t. Rotary motion is imparted to the stirrershafts from the driving-shaft s by the bevel gear-wheels 0 0 pinion c on the centershaft 8 and the gear-wheels a on the upperends of the stirrer-shafts s, as shown in Fig. 2. One of the arms of the upper crossframe or yoke 01 is connected by a pivot-rod r with an elbow-lever 0", that is fulcrumed to a bracket TX on'the outside of the shaft, the connecting-rod engaging one arm of the elbow lever, while the other arm is connected with a crank-rod 1' the opposite end of which is pivoted to the wrist-pin r of a gear vheel r on a stud-shaft attached to the upper part of the standard 8 said gear-wheel meshing with a pinion 1 at the end of the drivingshaft 8, as shown clearly in Fig. 7. The rotary motion, imparted by the drivingshaft to the gear-wheel 1' and the intermediate lever-mechanism, impart to the crossframes or yokes and the stirrer-shafts an oscillating motion in addition to their confrom the normal position, shown in Fig. 4,

to the second position, shown in Fig. 7, so

that the stirrer-arms being moved to or fro in the tank breakup those portions of the material located in the dead spaces between the stirrer-arms and tank and keep thereby the entire mass in proper motion for the thorough intermingling of the materials composing the same. By the joint action of the rotary motion of the stirrer-arms, simultaneously with the oscillating motion. of the stirrer-shafts, every part of the mass is continuously subjected to the mixing action and thereby the intimate and thorough intermingling of the substances secured and a perfectly homogeneous mass obtained.

In Figs. 6 and -7 the tank is shown removed from the standards I), and resting on The tank in these figures, is unprovided with a discharge faucet F, as it is obvious that this faucet maybe omitted without impairing the effective operation of V the tank, and thatother changes in details may be made without; in any manner departing from the-spirit of the invention.

Having thus described my invention, I desire. to secure by Letters Patent: a 1

1. In a mixing machine, the combination of a tank, upright shafts suspended in the ooaeoa interior of said tank, diametrical stirrerarms on said shafts, provided with bent shoulders between their inner and outer ends, said shoulders being arranged at gradually diminishing distances from the lower to the upper portions of two shafts, and in reverse arrangement on the other shafts, the stirrer-arms of one shaft intermeshing with the stirrer-arms of the adja cent shafts, and means for imparting rotary motion to said shafts and stirrer-arms.

2. In a mixing machine, the combination of a tank, upright shafts supported in said. tank, radial stirrer-arms on said shafts, the arms of each shaft intermeshing with the arms of the adjacent shafts and being providedwith bent shoulders intermediately of their ends, the shoulders on the arms of one shaft being farther from the shaft at the lower end and getting gradually closer to the shaft at the upper end, while the shout ders 0n the arms of the adjacent shaft are farthest from the shaft at their upper end and gradually getting eioser toward the lower end, and means for imparting rotary motion to the shafts and stirrer-arms.

3. In a mixing machine, the combination of a tank provided with interior laterally-inclined ribs, upright shafts in said tank, diametrical stirrer-arms on said shafts, the ends of the stirrer-arms of one shaft intermeshing with the stirrer-arms of the adjacent shafts, and means for imparting rotary motion to the stirrer-shafts and arms.

4t. In a mixing machine, the combination of a tank, cross-arms or yokes in said tank, upright shafts supported in step and neckbearings of said cross-frames, diametrical stirr-er-arms on said shafts, means for imparting continuous rotary motion to the shafts and the stirrer-arms, and means connected with one of the cross-arms or yokes for imparting, simultaneously with the rotary motion, an oscillating motion to the stirrer shafts and arms.

in a mixing niachine,-the combination, with a tank, of an upright rotating central driving-shaft in said tank, cross-frames or yokes supported on said central-shaft, upright stirrer-shafts supported in step and neck-bearings of said cross-frames or yokes, diametrical stirrer-arms on said shafts, a driving-shaft supported above said tank, means for imparting continuous rotary motion from the driving-shaft to said stirrer shafts and arms, and means interposed between the driving-shaft and one of the upper cross-frames or yokes for imparting oscillating motion to said cross-frames or okes and the stirrershafts supported thereon.

In testimony, that I claim the foregoin as my invention, 1 have signed my name in presence of two subscribing witnesses.

KURT R. STERNBERG. Witnesses PAUL G-OEPEL, JOHN MURTAGH. 

